High flame retardant cold storage board
- Core material thickness: 100mm 120mm 150mm 180mm 200mm
- Effective coverage:600mm-1000mm
- Core material weight: 40kg / m3
- Thermal conductivity: 0.024k.w/m
- Surface pattern: Square wave flat small ripple
- Combustion performance: Grade B
- Product Parameter
According to the new national fire test standard gb8624-2012, the fire performance of building materials and products can be divided into four levels
Class u, non combustible material
Ub1, refractory material (oxygen index above 30, vertical combustion height 15mm, continuous combustion time less than 5S, ignition time less than 30s)
Class u B2, combustible material (oxygen index is required to be above 26, and combustion droplets do not cause the combustion of absorbent cotton)
Class u B3, flammable material (not required for B3)
Rock wool and glass wool are Grade A
The fire rating of polyurethane sandwich panel is B1 B2 B3
Classification of sandwich panels (2)
Non metallic panel
The metal panel is easy to process and can be made into various shapes. However, in some cases, the non-metallic panel has the function that the metal panel cannot, such as corrosion resistance and impact resistance.
Coating type of color coated plate:
U polyester coating (PE)
U-si modified polyester coating (SMP)
U high weather resistant polyester coating (HDP)
U fluorocarbon coating (PVDF)
We usually say that the color coating generally refers to the polyester coating. The epoxy paint is suitable for the back paint of polyurethane sandwich panel and polyurethane contact.
The foam bonding test was carried out before delivery. Generally, it is pure epoxy back paint.
U small factory back paint is generally not pure epoxy, but added a part of polyester.
On PUR and PIR
The difference between PUR and PIR
U pur is polyurethane
U PIR is polyisocyanurate (polyisocyanurate foam) in Chinese
The fire protection performance of PIR is better than that of PUR and the mechanism of difference in fire performance
PUR is a foam system formed by reaction of polyether polyol with isocyanate. PIR is formed by reaction of polyester polyol with isocyanate. The crosslinking degree of PUR foam system is mainly dependent on the functionality of polyether polyols. The crosslinking degree of PIR system depends on the excess isocyanate trimer reaction. PIR is much higher than PUR's black material index, PUR index is generally 110-140, and PIR index is generally 250. Under the action of the corresponding catalyst, the excess isocyanate can react to generate six membered rings, which provides crosslinking to the foam group, and at the same time, through its own six membered ring molecular structure, it promotes combustion coking and charring, and improves the fireproof performance of the foam system. Generally, the index above 200 can be called PIR, and below 200 can only be called PIR and pur mixture.
Index (OI) refers to the lower oxygen concentration required for flaming combustion of materials in oxygen nitrogen mixture under specified conditions. It is expressed by the volume percentage of oxygen.
A high oxygen index indicates that the material is not easy to burn, while a low oxygen index indicates that the material is easy to burn.
u The oxygen index of flammable materials is less than 22
u The oxygen index of combustible materials is between 26 and 30
u The oxygen index of refractory material is more than 30
However, taking EPS (foamed polystyrene board) and XPS (extruded board) as examples, when these materials reach B1 level, their oxygen index can easily exceed 32, but polyurethane is difficult to reach 30. Unless the production process is changed, although the oxygen index reaches the standard after changing the process, other physical and chemical properties, such as thermal insulation and firmness, will be discounted, and the cost will also rise sharply.
The boiling point of n-pentane is 36.1 ℃, the compatibility of polyether is poor, and the dimensional stability of the board is good.
The pentane foam has poor cohesiveness and foam crispness.
The boiling point of cyclopentane is 49.3 ℃, the compatibility of polyether is good, and the dimensional stability of the board is worse than that of n-pentane. The thermal conductivity is lower than that of n-pentane.
Thermal conductivity (k value), or thermal conductivity.
U thermal conductivity is defined as: the heat per unit cross-section, length of material under unit temperature difference and unit time. The metric unit is watt / meter · Kelvin (w / m-k).
U thermal conductivity is used to measure the ability of a material to conduct heat. The higher the thermal conductivity, the less heat loss in the material.
Thermal resistance (r value)
U thermal resistance is defined as the ability of a material to block the passage of heat per unit area at a specified temperature. Unit: m · Kelvin / watt (m-k / W)
The U thermal resistance is used to represent the ability of a material to prevent heat conduction in a certain direction. The higher the R value of the material is, the more suitable it is to be used as thermal insulation material.
The R values of u continuous insulation materials can be added
Thermal conductivity (U value)
The U thermal conductivity coefficient is used to measure the thermal conductivity of the material, which represents the ability of the material to pass through the heat per unit area. The lower the U value, the better the thermal insulation performance of the material, in w / m2 · K.
Material thickness / K value = R value; U value is the reciprocal of R value, i.e. u = 1 / R.
The density is generally measured by drainage method (calculated by formula: density = weight / volume). The density of sheet foam is generally 38 to 46kg/m3 (generally full density). The density of polyurethane can be 20-700
Small density will cause shrinkage, and high density will affect the closed porosity and thermal conductivity.
- Product Features
- Core Advantages
- Hot Product
Product features polyurethane wall panel is generally used for the roof outer panel of buildings, which has good thermal insulation, heat insulation and sound insulation effect, and polyurethane does not support combustion, in line with fire safety. The combination of upper and lower plates and polyurethane has high strength and high strength
Polyurethane roof panel
Features of polyurethane roof panel: Henan Yuanda polyurethane energy-saving board is suitable for industrial and commercial buildings with roof inclination of 3%. The self-cleaning high-grade panel can reduce the ash accumulation on the roof, keep the building roof crystal for a long time, and improve the bearing capacity of roof panel with high wave peak
Polyurethane cold storage board
1. Concave convex groove structure, improve the insulation and air tightness of plate joint, designed for cold storage room and warehouse. 2. The board is uniform and stable, with excellent heat insulation and waterproof performance. 3. Light weight, beautiful appearance, effectively solve the temperature difference of refrigeration industry.
Polyurethane edge sealing rock wool wallboard
The production process of Polyurethane double side sealing rock wool sandwich board is adopted, which makes use of the excellent waterproof property of polyurethane products, overcomes the shortcomings of rock wool easy to absorb water and deliquescence, and effectively prolongs the service life of the product in terms of physical properties
Polyurethane edge sealing rock wool roof
The fireproof rock wool roof panel is connected with concealed nails, and the board surface is closely overlapped. The unique waterproof groove design can effectively prevent rainwater leakage and avoid cold bridge phenomenon. The 42mm wave crest height greatly improves the bearing capacity of roof slab. In order to ensure the effect of building insulation
Polyurethane edge sealing glass wool wallboard
1. Water ripple plate surface, with the visual effect of moving shadow. Set three-dimensional and elegant decorative effect in one, wall gloss, chroma, light with the light angle and location of different bright and dark stripes. 2. Hidden nail type lap joint, unique cold proof